1. I am writing to confirm /enquire/inform you…
我寫信是要確認/詢問/通知你…
2. I am writing to follow up on our earlier decision on the marketing campaign in Q2.
我寫信來追蹤我們之前對於第二季度營銷活動的決定。
3. With reference to our telephone conversation today…
關於我們今天在電話中的談話.。.
4. In my previous e-mail on October 5…
先前在10月5日所寫的信…
5. As I mentioned earlier about…
如我先前所提及關於…
6. As indicated in my previous e-mail…
如我在先前的'信中所提出…
7. As we discussed on the phone…
如我們上次在電話中的討論…
8. From our decision at the previous meeting…
如我們在上次會議中的決定…
9. As you requested/per your requirement…
按照你的要求…
reply to your e-mail dated April 1，we decided…
回答你在4月1日寫的信，我們決定…